Jefferson Fidelis
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Full-stack software engineer building AI-driven products — LLM applications, RAG pipelines, and real-time computer vision — end to end from architecture to production.

4+
Years of experience
20+
Projects shipped
6
Companies collaborated with
3
AI / Computer Vision projects
Selected Work
Projects worth a closer look
A curated set of production and research projects — the full list, including smaller practice builds, lives on the Projects page.
Experience
Where I've shipped
Full-stack and AI engineering across a BI-focused federal data company, freelance AI product work, and a competitive front-end scholarship program.
May 2026 — Present
Operations Analyst Jr. · Nefex
Technology operations and internal tooling at Nefex, building automations and integrations that streamline processes and improve operational efficiency.
Feb 2025 — Dec 2025
Software Engineer (Freelance) · Sensilog
Full-stack and AI engineering for client projects, from interactive front ends to production APIs and LLM-powered features.
Apr 2024 — Jan 2026
Business Intelligence Analyst (Intern) · Dataprev
BI systems development at Brazil's federal social-security data-processing company, focused on data analysis and dashboarding.
AI Lab
Where AI meets production engineering
LLMs, retrieval-augmented generation, and computer vision — explored as engineering problems with real interfaces, not isolated experiments.
LLMs & Agents
Multi-agent orchestration with CrewAI, RAG pipelines, and LLM fine-tuning for domain-specific applications.
Computer Vision
Real-time detection and gesture-based interaction with YOLO, OpenCV, and MediaPipe.
Applied, not academic
Every AI project ties back to a concrete workflow or interface — not a standalone notebook.
Stack
Tools I reach for
Grouped by area rather than scored with arbitrary percentages — proficiency is better judged from the projects themselves.
Frontend
Backend
Data & Storage
AI & Machine Learning
DevOps & Cloud
Worked with teams at
Testimonials
What colleagues say
Let's build something worth shipping.
Open to Software Engineering and AI-focused roles, research collaborations, and interesting freelance work.









